<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      //获取文案
      function getText(char) {
        let result = char.replace(/<.+>(.*)<\/.+>/i, "$1");
        console.log("html: ", char, "\n获取文案：", result);
        return result;
      }
      getText("<p class='demo'>hello JavaScript</p>");
      getText("<span class='demo'>hello 123!</span>");
    </script>
  </body>
</html>
